Malicious PDF — malware analysis report

Static analysis result for SHA-256 687bd575f01dc0a2…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 10:39:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fa107d8d87984df313af5a4c76cdc32a SHA-1: 2ed5a9157882c6453e6642c235935e8073621df6 SHA-256: 687bd575f01dc0a295b849800307fb89826da1d1947a5812890e2b4e45e12ea8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that point to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body and heuristics indicate a clear intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leading to a second-stage download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-spins-link-download-for-iphone-game-hack In PDF document text
    • https://www.sauvonsleclimat.org/images/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/robux-adder_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/coin-master-home_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB4 26992 bytes
SHA-256: 6fd02a281944ca8fc2eb49406e4a09df7c422a1f2554d8336d21294f6067903b
font_01_sfnt_off00008a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A64 18800 bytes
SHA-256: 32e4e5376f1e901ee57f900d0e5af1afa8be287b6f12ecb0545ded19bfaf4b04

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